MathSciDoc: An Archive for Mathematician ∫

@inproceedings{j.1977regularity,
  title={Regularity of spherical means},
  author={J. Peyrière, and P. Sjölin},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203502830843285},
  booktitle={Arkiv for Matematik},
  volume={16},
  number={1},
  pages={117-126},
  year={1977},
}